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Sunflower genus of plants of the family Asteraceae. The Latin scientific name of the genus is derived from the Greek words Helius and anthemon. Russian name arose from the fact that its inflorescences always turn toward the sun, which is expressed more than the other plants. This is partly true sunflowers really turning to the sun but only before they unfold from this moment they are looking to the east throughout the day.

This vast and polymorphic family, originating from North and South America, currently has about 110 species. Mainly herbaceous species grow in North America subshrub species mostly in Mexico and Peru. Some species grow as a weed. Sunflower characterized polymorphisms. Depending on the type is grass shrubs and bushes. Characterized by a high stalk coated alternately opposite or rigid leaves.

Inflorescence small in some species while others a very large head single or several in a spreading panicle. The head has a hemispherical or broad wrappers consisting of many series 2 or leaflets Receptacle flat overall or more or less convex covered with folded along plonchatymi sometimes quite hard bracts outer flowers reed disposed in one row central tubular bisexual flowers.

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